iH8Sn0w released Sn0wBreeze 2.9.7 that brings support for tethered jailbreak of iOS 6.0.1. New version supports iPhone 3GS, iPhone 4 and iPod Touch 4G. It does not work with A5/A6 devices, like iPad 2, iPad 3, iPhone 4S, iPhone 5, etc.

Sn0wbreeze can be used to create a custom firmware with jailbreak and preserve iPhone modem (baseband) version for unlock.

You can find the release notes below. You can download the latest version of Sn0wBreeze from here.

UPDATE: Apple released iOS 6.0.1, so you can NOT restore to earlier firmware (both original and custom), unless you have saved your SHSH keys. If you are on iOS 6.0 right now you can use this tutorial.

This is step-by-step instructions on how to perform tethered jailbreak of youriPod Touch 4G on iOS 6 firmware using RedSn0w 0.9.15 for Windows.

Tethered jailbreak means that each time you restart your device you will need to connect it to a computer and run redsn0w.